#VU21923 Reflected cross-site scripting in Broken Link Checker - CVE-2019-17207,CVE-2019-16521

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Main Vulnerability Database Vulnerabilities #VU21923

#VU21923 Reflected cross-site scripting in Broken Link Checker - CVE-2019-17207,CVE-2019-16521

Published: October 17, 2019


Vulnerability identifier: #VU21923
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear
CVE-ID: CVE-2019-17207,CVE-2019-16521
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Broken Link Checker
Software vendor:
Janis Elsts, Vladimir Prelovac

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to improper encoding and insertion of an HTTP GET parameter into HTML. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website, such as exploit the filter function on the page listing all detected broken links by providing an XSS payload in the "s_filter" GET parameter in the "filter_id=search" request.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

PoC: 

https://<host>/wp-admin/tools.php?page=view-broken-links&filter_id=search&s_filter=%22+id%3D%22blc-links%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E

Remediation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

External links